package servlet;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import com.google.gson.Gson;

import Util.GsonUtils;
import api.Sample;
import bean.PicCheck;

public class checkPicServlet extends HttpServlet {
	// 上传文件存储目录
	private static final String UPLOAD_DIRECTORY = "upload";
	private int i = 0;
	// 上传配置
	private static final int MEMORY_THRESHOLD = 1024 * 1024 * 3; // 3MB
	private static final int MAX_FILE_SIZE = 1024 * 1024 * 40; // 40MB
	private static final int MAX_REQUEST_SIZE = 1024 * 1024 * 50; // 50MB

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

		// 检测是否为多媒体上传
		if (!ServletFileUpload.isMultipartContent(req)) {
			// 如果不是则停止
			PrintWriter writer = resp.getWriter();
			writer.println("Error: 表单必须包含 enctype=multipart/form-data");
			writer.flush();
			return;
		}
		// 配置上传参数
		DiskFileItemFactory factory = new DiskFileItemFactory();
		// 设置内存临界值 - 超过后将产生临时文件并存储于临时目录中
		factory.setSizeThreshold(MEMORY_THRESHOLD);
		// 设置临时存储目录
		factory.setRepository(new File(System.getProperty("java.io.tmpdir")));

		ServletFileUpload upload = new ServletFileUpload(factory);

		// 设置最大文件上传值
		upload.setFileSizeMax(MAX_FILE_SIZE);

		// 设置最大请求值 (包含文件和表单数据)
		upload.setSizeMax(MAX_REQUEST_SIZE);

		// 中文处理
		upload.setHeaderEncoding("UTF-8");

		// 构造临时路径来存储上传的文件
		// 这个路径相对当前应用的目录
		// 跳转到 message.jsp
		resp.setContentType("text/html");
		resp.setCharacterEncoding("utf-8");
		PrintWriter out = resp.getWriter();
		String uploadPath = req.getServletContext().getRealPath("./") + UPLOAD_DIRECTORY;
		// 如果目录不存在则创建
		File uploadDir = new File(uploadPath);
		if (!uploadDir.exists()) {
			uploadDir.mkdir();
		}
		try {
			// 解析请求的内容提取文件数据
			List<FileItem> formItems = upload.parseRequest(req);
			if (formItems != null && formItems.size() > 0) {
				// 迭代表单数据
				for (FileItem item : formItems) {

					// 处理不在表单中的字段
					if (!item.isFormField()) {
						String fileName = new File(item.getName()).getName();
						// System.out.println(fileName);
						String filePath = uploadPath + File.separator + "jinritoutiao.png";
						File storeFile = new File(filePath);
						item.write(storeFile);
						String json = Sample.getInstaSample().checkPic(storeFile.toString());
						PicCheck picCheck = new Gson().fromJson(json, PicCheck.class);
						picCheck.setFileName(fileName);
						System.out.println(json);
						out.print(GsonUtils.toJson(picCheck));
					}
				}
			} else {
				System.out.print("上传文件失败");
			}
		} catch (Exception ex) {
			req.setAttribute("message", "错误信息: " + ex.getMessage());
		}

		// out.print("检验内容为空");
	}

}
